Over the past few years I have made numerous mention of images and videos on-line, most recently a video on YouTube and images from ‘screen-snaps’. The most common images posted are the ‘who is this person?’ image. They are posted on-line and in the media for the purposes of recognition. When used correctly, it is a valuable method to quickly disseminate information to a large number of people.
It doesn’t help matters though, when simple but important pre-processing is not completed prior to publication.
Posting poor images without clarification diminishes the value of the image and increases the chances of incorrect recognition intelligence. Some of the comments on the twitter feed about this image surrounded its poor quality.
So, what have we got, and what could we do?
1. Is this a screen-snap? Quite possibly. This will increase noise, produce incorrect colour and decrease clarity. Getting the original recorded image is the first job.
2. Two persons in motion, and the interlacing artefacts can clearly be seen. Of course the image will be distorted without de-interlacing….. but you can’t de-interlace a screen snap!
3. Decrease motion blur. Might be hard but a small amount of motion blur may be able to be corrected.
3. Basic colour correction. The first thing digital compression does to an image is reduce the values in an image.
4. Document processing filters & techniques
5. Save and document new image
6. Publicise on-line
So, its taken a couple of minutes longer… BUT, you now have a much higher quality image, with higher evidential integrity and a higher chance of positive recognitions.